Torigaya Keita

Torigaya is Washizu's best friend and sidekick. Always accompanying him, Keita is also a new friend of Chihaya, working with her as an assistant. Keita is later revealed to be a girl, but because of her appearance and voice initially, she's comically mistaken for a guy. It seems that only Ryo is unaware of this until at the end of the anime when he's gawking in shock at the fact that his best buddy is a girl.